In addition to anthocyanins, purple produce offers other key vitamins and nutrients. Here are a few purple powerhouses that nutritionists recommend adding to your dinner plate.

Purple Cauliflower

Cauliflower has powerful cancer-fighting properties, and the purple variety is an excellent source of vitamin C, fiber, potassium and B vitamins.

Purple Asparagus

This is similar in taste to white and green asparagus, but is also loaded with vitamin C, according to Brooking. The purple variety also contains two primary anthocyanins and has strong antioxidant scores.

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Purple Potatoes

Research shows that purple potatoes have two to four times the antioxidants of their white counterparts, Brooking says. "One study found that people who ate two servings of purple potatoes daily lowered their diastolic blood pressure by 4.3 percent and the systolic pressure decreased by 3.5 percent without gaining any weight."

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Eggplant

Eggplant is a low-calorie treat that has over a dozen kinds of antioxidants, registered dietician Cynthia Sass writes for Shape.com. She notes that in a study of animals, their cholesterol levels dropped after being fed eggplant juice.

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Plums

This juicy snack is a great source of vitamins A and C that support your immune system. Dried plums, or prunes, are full of minerals such as calcium, magnesium, iron and potassium, Sass writes.